
package com.warm.androidstudy.utils;

import android.content.Context;
import android.content.SharedPreferences;


import com.warm.androidstudy.config.AllUtilConfig;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;


/**
 * Created by admin on 2017/6/6.
 */
public class SPUtils {
    public SPUtils() {
        throw new UnsupportedOperationException("cannot be instantiated"); /* cannot be instantiated */
    }

    /**
     * 保存数据的方法，拿到保存数据的具体类型，然后根据类型调用不同的保存方法
     */
    public static void put(Context context, String FILE_NAME, String key, Object object) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        if (object instanceof String) {
            editor.putString(key, (String) object);
        } else if (object instanceof Integer) {
            editor.putInt(key, (Integer) object);
        } else if (object instanceof Boolean) {
            editor.putBoolean(key, (Boolean) object);
        } else if (object instanceof Float) {
            editor.putFloat(key, (Float) object);
        } else if (object instanceof Long) {
            editor.putLong(key, (Long) object);
        } else {
            editor.putString(key, object.toString());
        }
        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值
     */
    public static Object get(Context context, String FILE_NAME, String key, Object defaultObject) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        if (defaultObject instanceof String) {
            return sp.getString(key, (String) defaultObject);
        } else if (defaultObject instanceof Integer) {
            return sp.getInt(key, (Integer) defaultObject);
        } else if (defaultObject instanceof Boolean) {
            return sp.getBoolean(key, (Boolean) defaultObject);
        } else if (defaultObject instanceof Float) {
            return sp.getFloat(key, (Float) defaultObject);
        } else if (defaultObject instanceof Long) {
            return sp.getLong(key, (Long) defaultObject);
        }

        return null;
    }

    /**
     * 移除某个key值已经对应的值
     */
    public static void remove(Context context, String FILE_NAME, String key) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        editor.remove(key);
        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 清除所有数据
     */
    public static void clear(Context context, String FILE_NAME) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        editor.clear();
        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 查询某个key是否已经存在
     */
    public static boolean contains(Context context, String FILE_NAME, String key) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        return sp.contains(key);
    }

    /**
     * 返回所有的键值对
     */
    public static Map<String, ?> getAll(Context context, String FILE_NAME) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        return sp.getAll();
    }

    /**
     * 加密保存
     */
    public static void saveEncode(Context context, String FILE_NAME, String key, String object) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        String tmp = EncryptionUtils.encode(object, AllUtilConfig.DES_Key);
        editor.putString(key, tmp);
        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 解密读取
     */
    public static String getDecode(Context context, String FILE_NAME, String key) {
        String result = "";
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        String tmp = sp.getString(key, "");
        if (tmp.length() > 0) {
            result = EncryptionUtils.decode(tmp, AllUtilConfig.DES_Key);
        }
        return result;
    }

    /**
     * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类
     */
    @SuppressWarnings({
            "unchecked", "rawtypes"
    })
    private static class SharedPreferencesCompat {
        private static final Method sApplyMethod = findApplyMethod();

        private static Method findApplyMethod()// 反射查找apply的方法
        {
            try {
                Class clz = SharedPreferences.Editor.class;
                return clz.getMethod("apply");
            } catch (NoSuchMethodException e) {
            }

            return null;
        }

        public static void apply(SharedPreferences.Editor editor)// 如果找到则使用apply执行，否则使用commit
        {
            try {
                if (sApplyMethod != null) {
                    sApplyMethod.invoke(editor);
                    return;
                }
            } catch (IllegalArgumentException e) {
            } catch (IllegalAccessException e) {
            } catch (InvocationTargetException e) {
            }
            editor.commit();
        }
    }

}
